import Crypto from './crypto.js';
import './hmac.js';
import './sha1.js';
import {
	Base64
} from './base64.js';

const setting = uni.$setting;


let date = new Date();
  date.setHours(date.getHours() + 87600);
  let extime = date.toISOString();
  
var policyText = {
	"expiration": extime, //设置该Policy的失效时间，超过这个失效时间之后，就没有办法通过这个policy上传文件了
	"conditions": [
		["content-length-range", 0, 1024 * 1024 * 1024] // 设置上传文件的大小限制 这里限制1g
	]
};
var config = {
	accessid: setting.aliyunConfig.accessid,
	accesskey: setting.aliyunConfig.accesskey,
	osshost: setting.aliyunConfig.osshost,
	policyBase64: Base64.encode(JSON.stringify(policyText))
}
var message = config.policyBase64;
var bytes = Crypto.HMAC(Crypto.SHA1, message, config.accesskey, {
	asBytes: true
});
var signature = Crypto.util.bytesToBase64(bytes);
var timetamp = new Date().getTime();

function random_string(len) {
	len = len || 32;
	var chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
	var maxPos = chars.length;
	var pwd = '';
	for (let i = 0; i < len; i++) {
		pwd += chars.charAt(Math.floor(Math.random() * maxPos));
	}
	return pwd;
}
var OSS = {
	name: 'aliyun',
	host: config.osshost,
	accessid: config.accessid,
	signature: signature,
	policyBase64: config.policyBase64,
}
export default OSS;
